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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 4-6 days






2. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






3. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






4. What helps regulate spermatogenesis?






5. Scar tissue plugs up chambers of udder






6. 19-23 (21) days






7. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






8. Milk is 15% ________ and 85% __________.






9. ~305 days (altough often longer due to breeding difficulties)






10. Animals which have many estrous periods per year (ex: cow - sow)






11. Days which have increasing daylight hours

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12. Animals which have only one estrous cycle (ex: dog - fox)






13. Scar tissue plugs up chambers of udder






14. Can survive ~7 days in cow. vast majority <48 hours






15. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






16. What helps regulate spermatogenesis?






17. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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18. Animals which have only one estrous cycle (ex: dog - fox)






19. Parturition is controlled by...






20. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






21. Sperm is produced here






22. What about the sperm for a bull which has been castrated but still has testicles?






23. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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24. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






25. Duct through penis that carries sperm and urine






26. Not under a timeline - cow can not be sold as steak






27. (switzerland) 2nd in size and milk production - most muscle -






28. Animal which has been castrated after puberty






29. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






30. Start of the reproductive tract for the female. located outside of the body






31. ~60 days before calving






32. Days which have decreasing daylight hours

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33. Superior genes are _______ to multiply






34. Not under a timeline - cow can not be sold as steak






35. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






36. (LH) causes female's egg to break (her period)






37. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






38. Failure to have one testis (gonad) to descend






39. Look for infection - split - and rupture of the penis






40. Contains and regulates the temp of the testes for sperm production






41. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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42. Provide nourishment for the developing sperm






43. When are dairy cattle dehorned?






44. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






45. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






46. Way to know everything is alright with the breeding male






47. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






48. FEED






49. Milk ~305 days - dry 60 days prior to calving






50. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)